Solutions to End-of-Chapter Questions in
Mankiws Essentials of Economics
Chapter 8 Exercises:
Quick Quiz 2, p. 164
2. b Note that the demand is perfectly inelastic at Q=1. So, there is no change in the net price of $50,
and thus no change in producer surp

August 16, 2017
History 337
Spy vs. Spy
Daniel P. Bolger
Fall 2017
MWF 9:35-10:25AM
Park Shops 130
Purpose:
"I was a secret to my colleagues, and much of the time to myself."
John le Carr
"Well look, [the] CIA is an agency that has to collect intelligence

Chapter 15
GDP: Measuring A
Nations Total Output and
Income
Main Points:
Lecture #7
1. Defining and calculating GDP
2. The Expenditures approach to
GDP
3. The Income approach to GDP
4. Some problems with GDP
Gross Domestic Product (GDP)
GDP is a key macr

EC202-001 PRACTICE EXAM #1
To answer Question #1 refer to the following diagram, which shows the monthly cigarette market in
Wilson County, North Carolina and the demand for and supply of cigarettes before and after the
imposition of a per unit tax on cig

First law of thermodynamics states that the
increase in int E of a system is equal to sum of heat
supplied to the
system and WD on the system
Fixed pt
Ice-pt
Temp
0C /
273.15 K
The internal E of a system is the sum of random
distributn
of KE and PE associ

Dynami
Mass is a measure of the quantity of matter in a
body. It is a property of the body which resist
change in motion
Natural resistance to change of velocity inertia
Mass is a quantitative measure of inertia
The weight of an object is the attractive

Alternating
Root-mean-square value of an AC is the effective
value at a DC that produces that same heating
effect as the AC in a
given resistive load
Greater VH smaller PT loss in cable
electrical energy transmitted at high
voltage low current high-tens

EM
Magnetic flux passing through surface defined
as pdt of magnetic flux density normal to plane
of surface and
area of surface
One weber defined as magnetic flux passing
through a surface area of 1m2 where the
magnetic flux density
normal to plane of sur

COE
Charge is defined as amt of electricity which passes
through a given cross-section of a wire in unit time
when a
constant unit current is flowing
One coulomb is defined as amt of charge which
passes through a given cross-section of a wire in 1
sec whe

EM
Magnetic flux density of a B-field is defined as
force exerted on a unit length of conductor
carrying a unit
current placed at right angles to field
One tesla is the magnetic flux density of a
field in which a force of 1 N is exerted on
conductor of le

Wave
Progressive wave is one where energy is
transmitted from source of disturbance to the
surroundg region. There is
movement of wavefronts away from the source
Transverse wave is one where directn of vibratn is
perpendicular to directn of energy transfe

Oscillatio
Quantity
Free oscillations occur when a system is disturbed
momentarily and then allowed to oscillates about
its eqm position w no other ext force to sustain the
oscillation. In the absence of damping caused by
friction and viscous
forces free

1) If of radiatn is below a certain threshold value, no
photoe- is emitted, no matter how intense the radiatn
is
2) KEmax of photoe- depends on the (above threshold)
3) Rate of emission of photoe- depends on the intensity
of the radiatn. (given that is ab

Force is a push or pull due to interact betw objects
which
produces or tends to produce a change in motion
Torque of a couple abt any pt is the turning effect of
the couple and equal to the pdt of one force and
perpendicular
distance betw 2 forces
Non-con

GNewtons Law of Universal Gravitatnstates that the
mutual force of attractn betw any 2 pt masses is
directly proportional to the pdt of their masses and
inversely
proportional to the square of the distance betw
them
Gravitational field strength at a pt in

Electric
Coulombs Law of Electrostatics states that the
mag of the force betw 2 pt charges is directly
proportional to pdt of mag of charges and inversely
proportional to the square of
their separation
The e-field strength at a pt is defined as e-force pe

Conductn
Band
Valence
Band
Two-level laser not possible
Laser actn popln inversn required cannot be achieve w
just 2 levels cos the probability for absorptn and
simulated emissn is exactly the same
The E being used to pump the particles into upper laser

Superpositi
At nodes interfering waves always
cancel each other completely
Resultant amp is always 0
Happens because 2 waves meet in antiPrinciple of superposition states that when 2 or
more sets of waves of the same type meet at a pt in
space, the res

WE
The work done by a force on a body is the pdt of
force and
displacem of the body in the directn of the force
A Joule is the work done by a force of 1N when its
point of applicantn moves through a distance of 1m
in the direct of
the force
The work done

Circular
One radian is the angle subtended at the centre of
circle
when arc length is the same as the radius of the arc
Angular velocity of an object is defined as the rate
of
change of angular displacement
Period is defined as the time taken to make one